Henry newmaker



(No Model.)

H. NEWMAKER. Y GNE PULLBY.

No. 283,646. y Patented Aug. 21, 1883.

Mgg/M A points will be inclosed to such an extent thatA UNITED STATES HENRY NEVVMAKER, 0F STONEBOROUGH, PENNSYLVANIA.

coNe-PULLEY.

SPECIFICATION forming part of Letters Patent No. 283,646, dated August 21, 18783. i

` Application filed April 17, 1883. (No model.) i

To @ZZ whom it may concern,.-

Be it known that I, HENRY NEWMAKER, of Stoneborough, in the county of Mercer and State of Pennsylvania, have invented certain new and useful Improvements in Cone-Pulleys; and I do hereby declare the following to 'be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification .Y

My'invention relates to an improvement in cone-pulleys; and it consists in the combina tion of one or more pulleys which are formed of two conical parts, which' parts are keyed upon the shafts and made to slide back and forth thereon, withasuitable sliding frame, by means of which the pulleys can be opened and closed without interfering with the movement ofthe engine, as will be more fully described hereinafter. v

The object of my invention is to provide a pulley which can be opened and closed at the will of the operator without interfering with any other part of the machinery, for the purpose of increasing or decreasing the speed of the belt or band which passes around the pulley.

Figure l is a plan view of my invention complete. the parts of the pulleys.

Each pulley iscomposed of two conical portions, A, which are keyed to the shaft upon which they are placed, so as to revolve with it,

andA each one has a sliding movement upon its shaft independently of the other. Each part is grooved or recessed at its inner end for a greater or less distance, so that the prongs or fingers which form the other part of the pulley will slide into them. Each partbeing grooved or recessed in this manner, they can be forced toward each other, when these interlocking the bearing-surfaces for the cord or band which is passed around the pulley will be considerably increased, and thus cause the band or belt to have a more rapid motion. Then it is de- Fig. 2 is a detachable view of one ofsired that the cord or band shall move more slowly, the two parts of the pulley are drawn apart, so that their lingers or prongs will not 5o l other part ofthe machinery, two levers, H, are

provided, which are pivoted upon the crossbar I at any suitable point in between their ends. The inner edges of these two levers rest against the outer ends ofthe hubs of the pulleys, as shown. These two levers will be cony6o 'nected to an operating-lever, J by means of the connecting-rods L, so that the two levers can beopened and closed at will. When the op erating-lever is moved, the levers H are opened at one end and closed at the other, and the two pulleys at the end which is closed will be forced together, while the other two pulleys upon the other shaft will be forced apart by the pull of the driving-bandl upon them. In

proportion as the two pulleys are closed to- 7o gether, soas to make a larger bearing-surface for the band, the band is drawn in that direction, and as the other two pulleys slide freely upon the shaft as the-band pulls or bears upon their conical portions, so it will be forced out- Vward as far as the opened end of thelevers H will permit.

I am aware that sliding pulleys which are capable of enlarging or diminishing the bearing-surface of the driving-belt are not new, and 8o such I disclaim.

Having thus described my invention, I claim- The combination of the two sets of recessed cone-pulleys A and the shafts upon which 

